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(No Model.)

3 Sheets$heet 1.

D. GREIG 83 T. BENSTEAD.

BALANCE PLOW.

Patented Nov. 30. 1886.

Limugm hu. Washingiom D. C,

3 Sheets-Sheet 2;

No Model.)

'1). Games; T. BENSTEAD.

BALANCE PLOW.

Patented Nov. 30, 1886.

(No Model.) 3 Sheets-Sheet 3.

D. GREIG (ET. BENSTEAD.

BALANCE PLOW. No. 35'3,356. Patented Nov. 30, 1886.

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\\ l- D j vlllllllhnun N. PETERS. Phowiillmguflher. wnm m o. c.

, To all whom it may concern:

UNITED STATES PATENT OFFICE.

DAVID GREIG AND THOMAS BENSTEAD, OF LEEDS, COUNTY OF YORK,

' ENGLAND.

BALANCE-PLOW.

SPECIFICATION forming part of Letters Patent No. 353,356, dated November30, 1886.

Application filed October 11, 1886. Serial No.215,893. (No model.)

Be it known that we, DAVID GREIG and THOMAS BENSTEAD, both of the SteamPlow WVorks, Leeds, in the county of York, England, engineers, subjectsof the Queen of Great Britain, have invented certain new and usefulImprovements in Balance-Flows, of which the following is aspecification.

This invention consists in so constructing balance-plows that when oneset of plows are set into work the center upon which the plowbeam ispivoted is pulled forward out of the center of the beam, and so shortensthe length of the beam which is out of work. By these means a greaterweight is brought to bear upon the plows at work, and consequently theplows will adhere more regularly to their work and give a more evensurface to the bottom of the furrow.

The drawings hereunto annexed show various views of the central portionof a double balance-plow constructed to act in this manner.

Figure 1 is a side elevation, partly in sec- Y tion; Fig. 2, a planview, and Fig. 3 a vertical cross-section. Fig. 4 is a verticallongitudinal section showing the plow-beam in its central position,passingfrom one of its working positions to the other. In this figurethe chains are represented by dotted lines.

A is the plo\\"beam. At its center it has secured to it on each side aplate, B. O is the bar or axis upon which the plow-beam is pivoted. Itpasses through slots B", formed in the plate 13.

D is a loose sleeve embracing the bar 0, and capable of turning aroundit. On the sleeve D are fixed two toothed pinions, E. One gears with atoothed rack, B, 011 one side plate, 13, and the other with a toothedrack, 13, on the other side plate. On the sleeve 1), at its cen ter, isalso fixed a drum, F. Two chains are led partly around this drum. Onechain, G, is fixed to one arm of the plow -beam at G, and is then ledover the top of and around the drum, and then back again and secured toone of the hauling-ropes, I. The other chain, H, is fixed at H to theother arm of the plowbeam, and is similarly led over the top of the drumand. back again to the other haulingrope, J. Rings G H forming part ofthe two chains G and H, are also coupled together by a few links ofchain K. i

In Figs. 1 and 2 the rope I is shown to be acting as the hauling-rope,and draws the plow forward from the point G through a portion toward thecenter of the plow-beam A, and the opposite end of the plow to thatwhich has been at work is then set into the ground, and the pull of therope brings the shaft 0 past the center of the beam until it commencesto haul the whole implement forward from the point H through part ofeach chain G and H and through the few links K. The pinions and racksinsure that the shaft 0 shall always stand across the beam at rightangles to its length.

The shaft or bar 0 is supported by the two main wheels in the followingmanner: The short axles of the two main wheels project from blocks L,mounted on vertical spindles M at the two ends of a vertical rectangularframe, the lower bar of which is the bar G. The blocks L can be raisedor lowered on the spindles M by screws N, so that the height at whichthe shaft or bar 0 is carried from the ground can be adjusted, asdesired.

An arm, 0, on the one spindle M is also coupled to an arm, 0, on theother spindle M, and the steering of the implement is effected in theordinary manner.

Having now described our invention and the manner in which it is carriedout, we declare that What we claim is- 1. A balanccplow in which the baror shaft upon which the plow-beam is pivoted is drawn forward past thecenter of the beam in which ever direction the implement is being drawn.

2. The combination of the plow-beam A,

DAVID GREIG. THOMAS BENSTEAD.

Witnesses: V

P. GREENWOOD TALE, OCTAVIUS EDDISQN,

' Solicitors, Leeds.

